| BIS-TRIS, is a commonly used buffering agent that exhibits only a very small shift in dissociation constant. Synonyms: 2,2-Bis(hydroxymethyl)-2,2',2''-nitrilotriethanol, 2-Bis(2-hydroxyethyl)amino-2-(hydroxymethyl)-1,3-propanediol, Bis(2-hydroxyethyl)amino-tris(hydroxymethyl)methane CAS No: 6976-37-0 Molecular Formula: C8H19NO5 Molecular Weight: 209.24 Purity (Titration): 99% Appearance: White powder Solubility (0.1M, H2O): Clear, complete pH (1% H2O): 8.8-9.8 pKa (25C): 6.3-6.7 Water (KF): 1% Heavy Metals (Pb): 0.0003% Iron: 0.0003% Infrared Spectrum: Conforms to reference A280 (0.1M H2O): 0.04 A340 (0.1M H2O): 0.02 Melting Point: 103-105C (lit) Storage and Stability: Powder is stable for 12 months after receipt at RT. |
